/*
 * FindBugs - Find Bugs in Java programs
 * Copyright (C) 2006, University of Maryland
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 * 
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */
package edu.umd.cs.findbugs.gui2;

import java.io.File;
import java.util.ArrayList;

import javax.swing.JMenu;


/**
 * @author Dan
 */


public class RecentMenu{

	private static class LimitedArrayList<T> extends ArrayList<T>
	{
		public static final int MAX_ENTRIES=5;

		public LimitedArrayList()
		{
			super(MAX_ENTRIES);
		}

		@Override
		public boolean add(T element)
		{
			if (!this.contains(element))
			{
				super.add(0,element);
				if (this.size()>MAX_ENTRIES)
				{
					this.remove(MAX_ENTRIES);
				}
			}
			else
			{
				this.remove(element);
				super.add(0,element);
			}
			return true;
		}
	}

	LimitedArrayList<File> recentFiles;//Originally called recentProjects before merge two lists into one.
	JMenu recentMenu;

	public RecentMenu(JMenu menu)
	{
		recentFiles=new LimitedArrayList<File>();
		recentMenu=menu;
		
		for (File f: GUISaveState.getInstance().getRecentFiles())
		{
			recentFiles.add(f);
		}

		makeRecentMenu();
	}

	public void makeRecentMenu()
	{
		recentMenu.removeAll();
		for (File f: recentFiles)
		{
			Debug.println(f);
			if (!f.exists())
			{
				if (MainFrame.DEBUG) System.err.println("a recent project was not found, removing it from menu");
				continue;
			}

			recentMenu.add(MainFrame.getInstance().createRecentItem(f, SaveType.forFile(f)));
		}
		
	}

	/**
	 * Adds a file to the list of recent files used.
	 * @param f
	 */
	public void addRecentFile(final File f)
	{
		if (f != null)
		  recentFiles.add(f);

		makeRecentMenu();
	}

}
